A GIANT LANDING FOR MANKIND
By Sarah Fecht Posted April 9, 2016There couldn’t have been a more perfect launch than yesterday’s (April 8). The sun was shining, a gentle breeze was blowing, and SpaceX’s Falcon 9 rocket took off right on schedule. As we watched from a few miles away, the glare of the rocket’s flames was searingly bright, hard to look at but impossible to look away from, like the sparklers kids play with on the Fourth of July. The sound, too, was like Independence Day, the boom and shake of a thousand fireworks going off, crashing through the sound barrier.
The cargo made it safely into orbit, where it’s on its way to the International Space Station. But the real magic was in what happened after the launch. For the first time ever, the Falcon 9 came down for a gentle (non-explosive) landing on a drone ship. The achievement is critical in developing reusable, relatively low-cost spaceflight.
“It’s another step toward the stars,” said Musk during a press conference.
Traditionally, rocket boosters fall into the ocean after launch, never to be used again. But Musk often compares that to throwing away an airplane after every flight. Reusing the booster could shave millions of dollars off of launch costs, and the first step to that is getting the boosters back to Earth safely.
Does Coffee Give You a Different Buzz Than Tea?
SHORT ANSWER: YES, IN SUBTLE WAYS
Eighty-nine percent of American adults regularly consume caffeine, according to the Centers for Disease Control and Prevention. Two-thirds get it from coffee, one-sixth from tea, and the rest from soft drinks. People tend to assume caffeine is the only stimulant in these beverages, but tea, and even hot cocoa, contain other compounds thought to have psychoactive effects. And their levels of stimulation vary.
Caffeine is still the most intense stimulant. “It blows the others out of the water,” says Crystal Haskell-Ramsay, a nutritional psychologist at Northumbria University in England. But caffeine doesn’t act alone.
Tea, for example, contains the amino acid theanine. In 2008, Haskell-Ramsay showed that subjects who took large doses of caffeine and theanine together felt more alert than if they had taken them separately. The subjects also had better reaction time and working memory. …